Exploring thermal, optical, structural and luminescent properties of gamma irradiated Dy3+doped tellurite glasses: Photon shielding properties. (October 2022)

• Record Type: Journal Article
• Authors: Kaur, Sandeep; Pandey, O.P.; Jayasankar, C.K.; Verma, Neetu
• Is Part Of: Radiation physics and chemistry. Volume 199(2022)
• Publication Date: 2022-10
• Subjects: Dysprosium -- Zinc borotellurite glasses -- White light emission -- Radiative properties -- Physical properties -- Photon shielding properties; Radiation chemistry -- Periodicals; Radiometry -- Periodicals; Radiation -- Periodicals; Chimie sous rayonnement -- Périodiques; 539.2
• DOI: 10.1016/j.radphyschem.2022.110375
• Languages: English
• ISSNs: 0969-806X

Abstract

Abstract: The TeO2 –B2 O3 –ZnO-Dy2 O3 (TBZDyx ) glasses were irradiated with 50 kGy gamma radiation using a 60 Co radioisotope source. The effect of gamma irradiation on the physical, optical and spectroscopic properties of TBZDyx glasses was studied. The glasses remained amorphous after gamma irradiation. The optical studies revealed that the band gap values decreased after irradiation. The spectroscopic properties such as stimulated emission cross-section, bandwidth, lifetime etc. got marginally modified. The characteristic photon shielding properties of the Dy 3+ - doped TeO2 –B2 O3 –ZnO (TBZDyx ) glasses were studied using Phy-X/PSD software. The photon shielding properties of the glasses were accessed in terms of mass attenuation coefficient, half value layer and effective atomic number. The mass attenuation coefficient decreased as photon energy increased with exception at 0.004 MeV. The maximum value of MAC was found to be at 0.0015 MeV for TBZDy2.5 glass. The half value layer and mean free path decreased with increase in Dy 3+ -concentration. Whereas, the effective atomic number increased with increasing Dy 3+ - concentration. The results suggested that the photon shielding properties of the glasses improved with the addition of Dy 3+ and can be considered as candidates for photon shielding materials. Graphical abstract: Decay curves for the 4 F9/2 level of the prepared glasses (λex = 383 nm, λem = 575 nm). Solid line indicates Inokuti-Hirayama (IH) model fitting for dipole-dipole interaction.The mass attenuation coefficient (cm 2 /g) of pristine samples with photon energy (MeV). Image 1 Highlights: The Dy 3+ -doped zinc borotellurite glasses were subjected to 50 kGy gamma ray dose using a 60 Co radioisotope. The spectroscopic properties of the glasses were modified by the irradiation. The shielding properties of the pristine glasses were accessed using Phy-X/PSD software. The shielding properties of the TeO2 –B2 O3 –ZnO glasses got modified with the addition of RE.